Prolonged social lockdown during COVID-19 pandemic and hip fracture epidemiology

SLULLITEL, PABLO A.; LUCERO, CARLOS M.; SORUCO, MARIA L.; BARLA, JORGE D.; BENCHIMOL, JAVIER A.; BOIETTI, BRUNO R.; ZANOTTI, GERARDO; COMBA, FERNANDO; TAYPE-ZAMBONI, DANILO R.; CARABELLI, GUIDO S.; PICCALUGA, FRANCISCO; SANCINETO, CARLOS F.; DIEHL, MARIA; BUTTARO, MARTIN A.

INTERNATIONAL ORTHOPAEDICS

SPRINGER

Año: 2020 vol. 44 p. 1887 - 1895

0341-2695

Purpose: To analyse the impact of prolonged mandatory lockdown due to COVID-19 on hip fracture epidemiology. Methods: Retrospective case-control study of 160 hip fractures operated upon between December 2019 and May 2020. Based on the date of declaration of national lockdown, the cohort was separated into two groups: ?pre-COVID time? (PCT), including 86 patients, and ?COVID time? (CT), consisting of 74 patients. All CT patients tested negative for SARS-CoV-2. Patients were stratified based on demographic characteristics. Outcome measures were 30-day complications, readmissions and mortality. A logistic regression model was run to evaluate factors associated with mortality. Results: Age, female/male ratio, body mass index and American Society of Anaesthesia score were similar between both groups (p > 0.05). CT patients had a higher percentage of Charlson ≥ 5 and Rockwood Frailty Index ≥ 5 scores (p < 0.05) as well as lower UCLA and Instrumental Activities of Daily Living scores (p < 0.05). This translated into a higher hemiarthroplasty/total hip arthroplasty ratio during CT (p = 0.04). Thromboembolic disease was higher during CT (p = 0.02). Readmissions (all negative for SARS-CoV-2) were similar between both groups (p = 0.34). Eight (10.8%) casualties were detected in the CT group, whereas no deaths were seen in the control group. Logistic regression showed that frailer (p = 0.006, OR 10.46, 95%CI 8.95?16.1), less active (p = 0.018, OR 2.45, 95%CI 1.45?2.72) and those with a thromboembolic event (p = 0.005, OR 30, 95%CI 11?42) had a higher risk of mortality. Conclusion: Despite testing negative for SARS-CoV-2, CT patients were less active and frailer than PCT patients, depicting an epidemiological shift that was associated with higher mortality rate.